摘要
为给三蛱库区水土保持型植被建设提供一定依据，采用水浸实验和放水冲刷实验，对三蛱库区重庆缙云山4种典型林分（针阔叶混交林、常绿阔叶林、楠竹林和灌木林）林地土壤的抗蚀抗冲特征进行研究。结果表明：林地土壤抗蚀指数为农地土壤的1．3—1．9倍。各林分林地土壤抗蚀指数的顺序为灌木林最大（78．4），其次为混交林（63．1）和楠竹林（63．3），阔叶林最小（53．3）。抗蚀指数随着土层的增加而减弱。不同林分的抗蚀指数与时间的动态模拟关系为二次幂函数曲线，相关系数0．9以上。林地土壤抗蚀指数与其相关因子非毛管孔隙度、毛管孔隙度、稳渗率、有机质含量关系最密切。林地土壤抗冲系数为常绿阔叶林最大（2．719），其次为针阔混交林（2．431）和灌木林（2．024），楠竹林地土壤抗冲系数最小（1．096）。除楠竹林外，各林分林地土壤抗冲系数大于农地（1．2-1．9倍）。林地土壤抗冲系数与土层厚度关系最密切。关键词缙云山；林地土壤；抗蚀指数；
For the vegetation construction of soil soil erosion resistance of 4 typical forests （mixed and water conservation in Three Gorges Resevior, the forest wood, broadleaf forest, bamboo forest and shrub forest） in Jinyun mountain in Chongqing city were studied. Under the experiment of water dipping and scourry, the result shows that, the forest soil erosion resistance indexes is 1.3-1.9 times as farmland, and the order is that shrub forest （78.4） is maximum, mixed wood （63.1） and bamboo （63.3） are secondary, the minimum is broadleaf forest （53.3）. The soil erosion resistance index is weekened with the soil layer deepening. The tion between soil erosion resistance index and time is quadrati cient is above 0.9. The soil erosion resistance indexes have soil capillary analog equac power function curve, whose correlation coeffivery close relations with non-capillary porosity, porosity, final infiltration rate, the content of organic matter. The order of soil erosion resistance coefficient is that the maximal is broadleaf forest （2.719）, mixed wood （2.431）, and shrub forest （2.024） are secondary, and the minimal is bamboo forest （1.096）. Except bamboo forest soil, anti-scour resistance coefficients of other forest are more than that of farmland （1.2-1.9 times）, and the anti-scour resistance coefficients has a closest relation with the thickness of soil layer.
出处
《中国水土保持科学》
CSCD
2006年第1期20-26,54,共8页
Science of Soil and Water Conservation
基金
十五"国家攻关计划项目"长江三峡水源涵养林植被建设技术研究与示范"(2004BA510B0201)
国家林业局"长江三峡库区(重庆)森林生态站
关键词
缙云山
林地土壤
抗蚀指数
抗冲系数
Jinyun mountain
forest soil
soil erosion resistance index
anti-scour resistance coefficient
